Loom-temple thread cutter



JfNORTH-ROP. L OOM TEMPLE THREAD CUTTER.

. APPLICATION FILED JUNE 7, 1918- ELAQLJMSG Patented July 4, 1922?.

, fi fad/ M citizen of the United JONAS NORTHROR OF HOTPEDA'LE,iaassacnnsnrrs..asszerton TO HOE ED ALE TITAN U- FACTURING COMPANY, 015MILFORD, r/zassaorrusn'r rs. a CORPORATIQN or MASSACHUSETTS.

LOOM'I'IEMI-LE THREAD CUTTER.

1,421,815 Specification of Letters Patent Pateiited uly Applicationfiled June 7, 1915.

To all who-m it may concern:

Be it known that 1, Jonas Non'rnznor, a States, residing at Hopedale, inthe county of Worcester and State of Massachusetts, have inventedcertain new and useful Improvements in Loom- Ternple Thread Cutters; andI do hereby declare the following to be a full, clear, and exactdescription of the invention. such as will enable others skilled in theart to which it appertains to make and use tlie'same.

e present invention relates to an improvement in loom temple threaditters.

The loom temple on the replenishing side of an automatic loom is usuallyprovided with a thread cutter to adjacent the selvage, the weft threador strand of filling extending laterally from the selvage toward theweft replenishing mechanism. This strand of filling may be either theoutgoing filling end, that is to say, the strand of filling which isleft extending from the selvage to the shuttle by a critically exhaustedfilling carrier when the latter is ejected from the shuttle; or it maybe the incoming filling end, that is to say, the strand of filling exending from the hopper stud to the selvage after the first pick of theshuttle following the replenishing operation. This filling or weftthread varies in quality and thicknessaccording to the kind of fabricbeing woven; and it has been found that loom temple thread cutters whichwill successfully cut some kinds of filling will not suc cesstully cutother kinds, especially the heavier kinds such as duck or canvas wet'tthreads. it is accordingly one object of the present invention toproduce a loom temple thread cutter of such construction and arrangementof parts that it will operate equally successfully in cutting both lightandheavy Weft threads A further object of the invention is to produce aloom temple thread cutter of such construction that the positioning ofthe filling within the range of action of the cutting blades will bepositively etfected so that the filling will-be severed at a particulartime,in the present instance on the beatnip of the lay following that onwhich the filling was beaten up against the tell. it is recognized ofcourse that loom temples have heretofore been provided with threadcutters so constructed and timed in their mode of operation as topositively sever the filling at particular or predetermined severimmediately 1 Serial No. 233,650.

times; these thread cutters have also been constructed to successfullysever both light and heavy filling,- but so far as is knowrtat thepresent time, these loom temple thread cutters have been more or lesscomplicated in construction and unenduring in use. The positively actingthread cutter of the present invention on the contrary simple instructure and as enduring in use as is the usual form of temple threadcutter, with this feature of advantage however, that it acts positivelyat a particular time to sever the filling and is capable of severingsuccessfully all kinds of filling. The present invent on consists. inthe improved loom temple thread cutter hereinafter described and panticularly pointed out in the claims. I

The preferred form oi the invention is illustrated in the accompanyingdrawings in which Figure 1 is a side elevation of a loom temple showingthe application thereto oi the improved thread cutter ot' the presentinvention; Fig. 2 is plan of the thread cutter and of the rear cnd otthe temple; and Fig. 3 is a side elevation ot' the thread cutter showingthe cutter blades in the position they assume when the-lay is on itstront center. i The loom temple to which the improved thread cutter ofthe present invention is shown as applied, comprises the temple rod atwhich carries at its rear end or head 5, the roll cover (land the heel 7by which on the forward beat of the lay the temple rod is moved forwardupon the rod guide 9 which is secured to the breast beam 10. The templerod t is moved rcarwardly by its usual internally arranged spring. Theloom temple *arries on its rear end the improved thread cutter of thcpresent invention. The loom temple is located on the breast-bcam in sucha position as to bring the thread cutter i111- inediately outside andadjacent to the selvage of the cloth.

The improved loom temple thread cutter comprises two cooperating blades,an upper or oscillatory blade 14 and a lower or reciprocatory blade 15.The cutting part of the reciprocatory blade consists of two par allellyarranged members 16 and 17 (Fig.

which receive the oscillatory blade 14 between them and on which theoscillatory blade is pivoted at 18. The reciprocatory blade 15 isupported for sliding movements forwardly and rearwardly on a lug 20which lower end of which encircles a pin 30 in the cutter heel 27, tendsto press the reciprocatory blade rearwardly toward the lay as shown inFig. 1. This position of the reciprocatory blade is its normal positionand when it is in this position the rear end of the reciprocatory bladeprojects rearwardly beyond the fell of the cloth which is substantiallyon a line with the ear edge 31 of the temple head, or slightly to therear thereof; The movement of the reciprocatory blade rearwardly towardthe lay carriesthe cam part 32 of the oscillatory blade 14 against aroll 33 which turns on a pin 34 fixed in the upper part of the rear endof the cutter support 21. The engagement of the cam part 32 by the roll33 causes the oscillatory blade to swing on the pivot pin 18 as thereciprocatory blade completes its rearward movement thereby opening theblades to receive the filling between them. A shoulder 35, formed on thelower forward end of the oscillatory blade by its engagement with theupper surface of'the reciprocatory blade determines the open position ofthe oscillatory blade. ment of the blades is limited by the engagementof a shoulder 38 formed on the cutter heel 27 with the lug 20 on theblade support.

Thereception of the filling between the blades is facilitated by thebeveled rear edges 37 of the blades which act to direct thefillingbetween the blades. lVhen the filling is beaten up against the fell bythe reed 40, it is held there by the crossing of the warp threads.\Vhile the reed is against the fell the lay is on its vfront center andthe cutter blades are in the position shown in Fig. 3. If now thisfilling is either the outgoing filling end or the incoming filling end,the part thereof extending laterally outwardly from the selvage willremain in the path of the cutter blades as they move rearwardly on thebackward beat of the lay. The filling being engaged by the beveled edge37 of either the reciprocatory or the oscillatory blade. will bedirected toward the point of divergence 92 of the beveled edges of theblades. The pressure of. the blades against the filling, as theymovcrearwardly with the filling before opening; puts it under a slighttension, so that when the blades open, the filling snaps forwardly Therearward movemantis the selvage and direct it into position to bereceived between the blades when the blades open. Thus the action of theblades upon the filling is positive and certain.

It is apparent from the foregoing description of the construction of theimproved loom temple thread cutter that the lay strikes the cutter heel27 on each forward beat and thereby pushes the geciprooatory bladeforward with it and that on the return or backward beat of the lay thespring 28 moves 8 0 the blade rearwardly. As the reciprocatory blademoves forwardly under pressure of the lay it carries'the oscillatoryblade with it and this causes the upper surface 39 of the oscillatoryblade to be drawn under the roll 55 33 so as to close the oscillatoryblade upon the reciprocatory blade as shownin Fig. 3. The oscillatoryblade is closed upon the reciprocatory blade before the blades reach theposition shown in Fig. 3. In fact the oscillatory blade closes upon thereciprocatory blade immediately after the striking of the heel-27 by thelay. This is .necessary in order that the filling may be acted uponbefore the blades are pushed forwardly beyond the fell. It will beapparent from a consideration of Fig. 3 that the blades can never actupon the filling on the beat-up during which the filling is beatenagainst the fell ,by the reed -10,.because by the time 100.

the reed reaches the fell the blades have been closed and moved forward.

Let it be assumed for the purposes of illustration that the loom templethread cutter of the present invention is applied to a feelcr controlledreplenishing loom and that the filling feeler mechanism has indicatedthat the filling in the active shuttle has been exhausted to apredetermined extent. Ac-

cordingly, on the replenishing beat-up of the lit) lay, with the shuttlein the replenishing shuttle box, an intact strand of filling will lextend from the sclvage to the filling carrier about to be ejected. Asbefore described,

this filling .will not be severed by the thread cutter on this beat upof the lay. The replenishing operation having taken place and the usualteclcr thread cutter and clamp having operated to sever and clamp theoutgoing filling end relatively near the inner end of the replenishingshuttle box. the lay beats backward. As the lay moves from' engagementwith the heel 27 the spring 28 moves the 'cutter blades rearwardly andpresess them against the filling, the beveled edges 37 directing thefilling to the point of divergence 42 of the beveled edges. The outgoingfilling end is now in a position to be received between the cutterblades as they open. This filling end being held at the fell cl coursedoes not more rearvvardlg the lay so thatwher'i on the nest. bosons, thelay strikes the cutter heel 27 to move the blades forwardly, the bladesclose upon and sever the filling end. Din-inc this beat-up of the lay,which is the first beat-up following the replenishing operation, theincoming filling end has been beaten up against the fell. it isaccordingly in position to be received between the cutter blades on thenext bacln ward beat of the lay, and is then severed on thenextsucceeding forward beat of the lay; It is thus seen that theoutgoing filling end is severed by the thread cutter ot' the presentinvention on the first forward beat of the lay after reilenishment andthat the incoming filling end is severed on the second forward beat ofthe lay after replenishment.

It will be observed that by reason or" the particular arrangement of thepivot pin of the oscillatory blade with respect to the roll 33, which byits on renient with the upper surface 39 of the oscillatory causes theblade to be closed upon the reciprocatory blade. a considerable leverageis exerted by the cutting end of the blades upon any substance thatmight be between the tvvo blades, and that consequently it is possiblefor the blades to sever successfully the heaviest kinds of filling.Another advantage of the present construction of thread cutterlies inthe fact that the blades, by reason ot' extending rearvvardly beyond thefelL-are actuated to close upon the filling while the lay is yet at asubstantial distance from its forward center and at a time when the layis moving comparatively rapidly. Consequently the impetus of the impactof the lay against the cutter heel 27 is such as to impart a rapidclosing movement to the oscillatory blade.

This materially assists in causing the blades to perform successfullytheir cutting operation on the heaviest kinds of filling.

Having thus described the invention What is claimed is:

I 1. A thread cutter for looms comprising a movable supporting 'iernb.r, cutter blades mounted thereon and capable independently thereof, theout ing beveled rear edges adapted to engage a strand of filling: whenthe cutter blades are moved rearwardly in closed position and to therebyposition the filling under tension to be received between the bladeswhen they are opened, and means for opening; the blades at near the endtheir movement and for closing the blades the beginning of theirsubsequent forward movement.

2. A thread cutter for looms con'iprising a movable supporting member,cutter blades mounted thereon and capable of movement independentlythereof, the cutter blades having' beveled rear edges adapted to engagea strand of filling when the cutter blades are mo 'ed rcarwardly in aclosed position and to thereby pos tion the filling under tension to bercccivnl bctWN-n the blades when the: are opened. and lllfulls l'ormoving the blades.

3. A thread cutter for looms crmlprising t-vvo movable cutter bladesprovided with beveled rear edges, which cooperate to form a fillingengaging mouth when the blades are closed, means for moving the cutterblades in a closed position toward the lay to engage a filling strandWithin the mouth and to place it under tension, means to open the bladesafter the filling strand has been engaged to permit it to snap betweenthe blades, to close the blades and sever the thread upon movement ofthe blades in the other direction.

4. A thread cutter ,t'or looms comprising cutter blades movableforwardly and rearwardly, means for moving said blades forwardly andrearu'ardly, and'ireans for opening and closing the blades havingprovision whereby the blades are presented in a closed position to anoutgoing filling thread on the replenishing beat up of the lay, areopened to receive the fillingthread on the next backward beat of the layand are closed to sever the thread on the first beat up of the laya'ltcr replenishment.

5. A thread cutter for looms comprising cutter blades movable? forwardlyand rear Wardly, ine'iliis for moving said blades for Wardly andrcarwardly, and means for opening and closing the blades havingprovision whereby the blades are presented in a closed position to anincoming: filling; thread on the first beat up the lay afterreplenishment, are. opened to receive the filling" thread on the nextbackward beat of the lay, and are closed to sever the thread on thesecond best up oi the lay after replenishment.

thread cutter for looms comprising cutter blades movable forwardly andrear- Wa-rdly, means cooperating with the latter to sent t-l'ie bladesin a closed position to on the re plenish an outgoing filling, threadbeatup of the to open the blades and bacl'yvard beat of the lay, toclose the i k on the 'i'irstbeat up of the lay after replenishl 1 sametime to present them ion to the incoming filling t backward beat of thebl "ides and sever the incoming filling "read on the second beat u p ofthe lay alter replenishment.

I. A thread cutter for looms comprising cutter blades movable forwardlyand rearvvardly, and means for opening and closing the cutter blades,said means having provision Whereby the cutter blades engage, in

l "posi tl'iread on the i .a closed position as the lay beats forward,

a filling end extended from the selvage other than the filling endleading to the active nd sever the out oing lling thread shuttle, areopened to receive the fillin on the next backward beat of the lay, anare closed" to sever the fi11ing ward beat of the lay.

8. A thread cutter for looms comprising cutter bledeszmovable forwardlyand tearon the next for wardly, and means for opening and closing thecutter blades, said means having provision Merebv the blades are closedbefore engaging a filiing thread extended from the selvage other thanthe filling thread leading to the active shuttle, so that the threadthus engaged is never severed on the beat up of the lay upon which theparticular fillin is beaten against the fell.

JONAS NORTHROP

